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Moving a previously zero'd scope
- Thread starter yeti rider
- Start date
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It should be "close" to where it was - but it won't be exact. It should be zero'd again.
Yup. I have the good (?) Bobro return to zero on both of my reach out and touch AR's and the optics always need tweaked.
Even Bobro (IMO the best) will move POI about .3-.4 MOA.
To the OP. If you move it forward or back slots, you will lose your zero with any mount, but you will be in the wheel house.
Yup. Falls into the "close, but no cigar" field of adjustment. Move it to fit. Just check it b4 you trust it.
The only rails that will return to zero exactly are BR grade like Kelbly, and that CAN include Picatinny rails, but rarely actually does. Anything less than that level of machining in the rails or rings, and CERTAINLY on an AR receiver, and you will find they don't return, and really GOOD rings and rails, when bolted down to a rough receiver, aren't any better than crap.
AR receivers are VERY often twisted. Easy to see: put the upper in a vice and lay a bubble level or digital protractor on the rear slot, then on the front. I betcha they won't be the same.
So the short answer is: you need to level the scope as well as possible, lap/bed it in as needed, and torque it down, in the position you want it to be. Make sure you are pushing the mount/rings fully forward in the pic slots before your torque, and when you do so, you need to use a torque wrench to allow for repeatability...or at the very least, paint-pen mark your rail and ring bolts so you can come back to the same amount.
AR receivers are VERY often twisted. Easy to see: put the upper in a vice and lay a bubble level or digital protractor on the rear slot, then on the front. I betcha they won't be the same.
So the short answer is: you need to level the scope as well as possible, lap/bed it in as needed, and torque it down, in the position you want it to be. Make sure you are pushing the mount/rings fully forward in the pic slots before your torque, and when you do so, you need to use a torque wrench to allow for repeatability...or at the very least, paint-pen mark your rail and ring bolts so you can come back to the same amount.
